Cannot enter "-" (hyphen), "/" (forward slash) etc. in topics.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. In topic name type in "-" or "/", etc.

What is the expected output? What do you see instead?
Typed in "-" or "/", etc. should be in the topic name.
XMind doesn't accept "-" or "/", etc and it immediately exit topic name editing 
and only accept what was typed up yo "-" or "/", etc. character.

What version of the product are you using? On what operating system?
XMind version: XMind 2013 (v3.4.0.201311050558)
OS version   : Ubuntu 13.04 64-bit
Java version : 1.7.0_25
               OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.13.04.2)

Original issue reported on code.google.com by Aldrin.Baroi@gmail.com on 5 Jan 2014 at 3:32

[GoogleCodeExporter]

Additional Info:

If a topic name with a "-" (hyphen) or "/" (forward slash) is copied from say 
"gedit" and pasted into XMind then it accepts the name without any issues.

After you pasted the topic name, you can go back and edit the name and the "-" 
(hyphen), etc. character will remain with the topic name as long as you don't 
touch the "-" (hyphen), etc. character.

Original comment by Aldrin.Baroi@gmail.com on 5 Jan 2014 at 3:47

[GoogleCodeExporter]

Additional Info:

Now same issue with sheet name:

I was able to enter "-" (hyphen) in sheet name.... It was working last few 
hours...  Now suddenly, I cannot enter "-" (hyphen) in sheet name any more :-(( 
 ....  

I have checked the "/home/aldrin/.xmind/workspace-cathy/.metadata/.log" file: 
there is no error or stacktrace logged.

Let me know if there is any other place I can look for error log.

Original comment by Aldrin.Baroi@gmail.com on 5 Jan 2014 at 6:20

[GoogleCodeExporter]

Its December 2014. Is there a solution to this problem. I cannot enter any 
operation sigh (+ - * /).

Original comment by abir...@gmail.com on 14 Dec 2014 at 11:50